^○Takuki Sakaguchi¹, Masahiro Nakagawa², Motowo Mizuno¹ (1.Dept. of Internal Medicine, Hiroshima City Hospital, Hiroshima, Japan, 2.Department of Endoscopy, Hiroshima City Hospital, Hiroshima, Japan)

^○Toshihiro Fujita¹, Yuichiro Nasu¹, Hitomi Hamamoto¹, Yuga Komaki¹, Shiho Arima¹, Junichi Nakazawa¹, Fumisato Sasaki¹, Hiroki Taguchi¹, Shinichi Hashimoto¹, Shuji Kanmura¹, Hitoshi Setoyama¹, Masatsugu Numata², Hirohumi Uto¹, Akio Ido¹ (1.Dept. of Digestive and Lifestyle Diseases, Kagoshima University Graduate School of Medical and Dental Sciences, Kagoshima, Japan, 2.Division of Endoscopy, Kagoshima University Medical and Dental Hospital, Kagoshima, Japan)

^○Hidezumi Kikuchi^1,2, Tadashi Shimoyama², Tatsuya Mikami³, Miwa Satake², Shirou Hayamizu², Hiroto Hiraga², Manabu Sawaya², Daisuke Chinda², Hirotake Sakuraba², Norihiro Hanabata², Masashi Matsuzaka⁴, Yoshihiro Sasaki⁵, Shinsaku Fukuda² (1.Community Medicine, Hirosaki University Graduate School of Medicine, Aomori, Japan, 2.Gastroenterology and Hematology, Hirosaki University Graduate School of Medicine, Aomori, Japan, 3.Div. of Endoscopy, Hirosaki University Hospital, Aomori, Japan, 4.Cancer Epidemiology and Community Health, Hirosaki University Graduate School of Medicine, Aomori, Japan, 5.Medical Informatics, Hirosaki University Graduate School of Medicine, Aomori, Japan)

^○Koichiro Kawano, Kosuke Kawaji, Kohei Yamakawa, Makoto Sono, Takanori Harada, Kaeko Hashimoto, Satoshi Nishimura, Kotaro Watanabe, Noriyo Kimura, Masaki Watanabe, Yasushi Kudo, Atsushi Yamauchi, Tadayuki Ko, Masanori Asada, Toyokazu Fukunaga, Kiyotaka Kawaguchi, Shujiro Yazumi (Div. of Gastroenterology and Hepatology Digestive Disease Center. Kitano Hospital, Osaka, Japan)

^○Tomohiro Sekiguchi, Shinya Hukuzawa, Tomoaki Suga (Dept. of Medicine, Div. of Gastroenterology and Hepatology, Shinshu University School of Medicine, Matsumoto, Japan.)